Title : Optical asymmetric transmission in dielectric nanopillar structures

Optical asymmetric transmission holds significant importance for optical applications. Periodic dielectric gratings are attractive for asymmetric transmission owing to their fabrication simplicity. In this work, we study the asymmetric transmission properties of a periodic all-dielectric grating structure fabricated on a semi-infinite silica substrate. When considering the visible-to-near-infrared wavelength range, the period and substrate refractive index are closely related with asymmetric transmission. These parameters can collectively control the wavelength range over which asymmetric transmission occurs. The asymmetric transmission is attributed to the difference in intensity between higher-order diffraction orders with forward and backward incident light. For macroscopic periodic structures, no optical asymmetric transmission was observed.

Dr. Shuai Gao is a researcher specializing in nano-optics. Currently pursuing his PhD at Southeast University, he holds a Bachelor’s degree from China University of Petroleum (East China) and a Master’s degree from East China Normal University, where he specialized in quantum optics. During his doctoral studies, he has published one paper in Physica Scripta.